Test - GE Multilin 469 Instruction Manual

7.2.3 Ground and Differential Accuracy Test
7–4
APPLIED EXPECTED
LINE-NEUTRAL VOLTAGE
VOLTAGE READING
200 V 2000 V
270 V 2700 V
The 469 specification for differential current and 1 A/5 A ground current input accuracy is
±0.5% of 1 × CT for the 5 A input and 0.5% of 5 × CT for the 1 A input. Perform the steps
below to verify accuracy.
5 A Input
Alter the following settings:
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
Measured values should be ±5 A.
Inject the values shown in the table below into one phase only.
Verify accuracy of the measured values.
View the measured values in:
A2 METERING DATA
INJECTED EXPECTED
CURRENT CURRENT
5 A UNIT READING
0.5 A 100 A
1.0 A 200 A
2.5 A 500 A
5.0 A 1000 A
1 A Input
Alter the following settings:
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP CURRENT SENSING
Measured values should be ±25 A.
Inject the values shown below into one phase only.
Verify accuracy of the measured values.
View the measured values in:
MEASURED MEASURED
VOLTAGE A-N VOLTAGE B-N
"5A Secondary"
GROUND CT:
GROUND CT PRIMARY:
PHASE DIFFERENTIAL CT:
PHASE DIFFERENTIAL CT PRIMARY:
CURRENT METERING
MEASURED MEASURED DIFFERENTIAL
GROUND
CURRENT
PHASE A
"1A Secondary"
GROUND CT:
GROUND CT PRIMARY:
PHASE DIFFERENTIAL CT:
PHASE DIFFERENTIAL CT PRIMARY:
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 7: TESTING
MEASURED
VOLTAGE C-N
"1000 A"
"5A Secondary"
"1000 A"
CURRENT
PHASE B PHASE C
"1000 A"
"1A Secondary"
"1000 A"